Shuttle-eye guide plate



- I. SNOW SHUTTLE EYE GUIDE PLATE [110d Doc. 17, 1924 UNITED": STATES i chamber 10 for the bobbin B from which the Patented July 12, 1927 SHUTTLE-EYE IYS'AAC snow, ornawnnnion, iuassAoi UsEr'rs.

some PLATE.

Application filed December 17,1924. Serial No. 758,467.

This invention relates to self threadi-iig' shuttles and is an improvement on the type of shuttle shownin patents to Snow of J Line 29, 1920, No 1,344,734, and 0f FebQQ, 1921, No. 1,369,806, and patentto Allen, Oct. 28, 1913, No. 1,076,935.

in an automatic loom when "the bobbin is shifted, at the firstpick it is desirable that the yarn should automatically slip under a front hook and preferably also under aback hook or guide, and during the second pick should slip into the eye down inback of the horn and in front of the'pin, and should stay there. v p

However at the beginning of the second I pick there is a period when the yarn is slack and there is a tendency to kink. During this period there is-a tendency for the yarn to drop or slip out from under the front hook, and'being kinked, to remain out during that part, and to run over the topofthe shuttle block. a

To prevent this, it is desirable that the front hook should extend down and forward.

This extending of the fronthook forward however makes it more diflicult for the yarn to pull back into position if it starts to run over the top and front of the shuttle block or guide plate.

The main feature of my device is the shapa ing of the front elevatioii of the front hook whereby the. yarn will readily pull off and still allowthe extension of the front hook.

In the drawings l ig. 1 is a plan view ofa shuttle with my improvement. 1 Fig 2 is an elevation as frointhe bottom of Fig. 1, showing my shuttle block removed from the shuttle. r

Fig. 3' is a sectional elevation as from the right, on line 33, of Fig. 1, showing the shuttle block not insection, and'theiwood in section. '1

Fig; 4 is an elevation from the left of Fig.2. I

Fig.v 5 is on BlQVfLtlOIII IOm the back of Fig. 2, or the left of Fig. V

Fig. 6 is a plan View similar to Fig. l. showing'a modification of my device.

S is a shuttle of the self-threading type for automatic looms, having the usual bobbin thread A is unwound in the direction of the arrow in Fig. 1. 1121s the thread chamber which extends forward in continuation of bobbin chamber 10', and 13 is the delivery passage which extends still further foi-wa rd frohi the threading chamber.

represents the shuttle eye inthe wood,

and this connects with the threading chainber '12 "through the slot 15- cut away from the'del ivery passage 13-. 8 represents the meta] tip of the shuttle."

Th s eye'H'is what is known as a left eye,

as it is at the left when looking towards the o a5 7 represents a metallic threading block which is set into arecess in the woodof the" tip 8 the shuttle.

shuttle and'isshownas fixed therein by ineansof screw 36 wliiol'i passes through a hole in the wood of the shuttle and a hole in the block, in a'well known manner.

Preferably there isalso at'the bottom of bloc-ki l, the projection which fits 'into a recessi'n the woodof the shuttle.

, 32 is the-horn and 38 the thread pin, both of well known form. I

My improvement is more particularly usefulflin connection with a certain type of.

tlireadingfbl'ock such as shown in patents to Show and Allen referred to herein and as shown at F in F gs: 1 to 5, in which there isathread directing guideplate G which,

extends from the top thereof and from the topside of the'shi'ittle, down and out at 22 into the threading chamber 12', or that part of the threading chamber which is enclosed in the tl'ir'ead'ing block itself indicated. at 9 in l. i

In Figs. 1' to 5, there is at or near the back a thread retainii' g-gui'de hook or member 2Sw'hich is in extensionlof the sloping part 22 of guide plate G; As this togetheriwith the part 22 of guide plate G extends in the same direction and proXimat-e'the normal unwinding path of the thread as it unwinds on the first pick of the shuttle in a magazine loom, that is in the direction of the arrow 'in Fig. 4,. it is clearthat it will slip into the part 9 of the threading chamber 12..

This is provided. the axis of the bobbinB somewherenearly coincides with the center or, axis'of the passage 9 as should be the case and as shuttles are ordinarily 'constructed.

It is clear that whenoiice' in the passage 9,

the unwinding thread will travel around in the direction-cf the arrow as it unwinds from the bobbin, and there will be very little 1 likelihood of its unthreading even it there is no overlap locking device such as shown in certain other patents.

The guide plate G which is shown as the top of shuttle block F extends from a point at about 17 substantially level with the top of the shuttle downward away from the eye I-l across a plane represented by X, Y, in Fig. 3, which extends vertically through the axis oi the bobbin B when it is in position, and terminates at the front in a front hook 116 in extension of the top which curves down at 18 in a direction away from the shuttle eye, and thence downward towards the shuttle eye to the point 19. The front edge 3 extends in a substantially straight direction from about a point. 117 which is about over the eye I-l: forward, along and around hook 116 to the lower forward end thereof, 19.

The guide plate G at the back preferably also extends down into passage 9 in the form of a back hook 28 which extends sharply downward and thence at 2%, over towards the side where the shuttle eye H is located. Both hooks 16 and 28 extend down and around in the direction in which the yarn unwinds from the bobbin.

As shown in Fig. 5, I prefer that the distance from front to hack of plate (:lr along, the line 90 to 91 in Fig. 5 should be greater than the distance 92, 93 so that any loop (Iii yarn which may form will slip oil.

I also prefer that the distance from front to hack on hack hook 28, along line 9-1 to 95 shall he greater than alongthe line 96 to 97, for the same reason, and that the front hook shall taper or grow gradually smaller from base to end from along the line 98, 99 to the tip. In the same way, the back hook from 96 to 97 to the tip should also grow smaller.

Any loops of yarn :t'orlning along 90, 91 or St, 95 or 98, 99 will automatically slip on.

If a loop of yarn such as 5, shown in Fig. 1, forms while the shuttle is starting back on the second pick the front hook 16 extending forward in extension of the front edge of the guide plate G, and the fact that itcurves downward in a direction away from the shuttle eye, and thence downward towards the shuttle eye, prevents the yarn from slippingdown under the hook, and unthreading.

If the yarn escapes from the hack hook 28 and starts up over the top of guide plate G as indicated at A in Figs. 2 and 3, the pull of the yarn around the point 30, back of the horn 32, is such that it will slip down from about the point 18 around the tip 19 01' the nose, as this curve is such that, as it travels it will always be getting closer to the point. 30 from which the pull comes.

As shown in Figs. and 3, if the yarn A slips up and over so that it runs over the top between 17 and 18, the pull from the point 30 up in back of the tip 31 of nose 353 will cause it to slide down along 18, and around the bend to 19 from whence it will slip into place, and as the yarn unwinds it will he carried down around the end of back hook 24:.

its shown in Fig. 6, the guide plate K may be fastened by means of pins 87 to the wood of the shuttle, and instead of a hack hook may extend down in curve 83, the plate sloping down and over to the left at 84;, and extending forward to the front hook 230 which is or the same shape as 18, and terminates at the point: 82. The front edge 86 of guide plate K is not straight as is edge 3 of plate (i, but curves in a well known manner.

: shown at 120 in Fig. 3, I prefer to ex tend a web down in behind hook 16 so as to keep the yarn pretty well down as it thereby helps to overcome any tendency of the yarn to run over the top, between 17 and 18, and cooperates with pull from point 30.

l claim:

I. The combination in a shuttle having; an eye. a bohhin chamber, and a threading chanilwr in continuatim'i thereof which con nects with the eye. of a thread directing guide plate so .lixcd to the top side of the shuttle a to extend downward and across a plane extentlingvertically through the axis of a bobbin when in position in the shuttle fill and terminating in a nose which includes a lront hook in extension ol the guide plate which curves down ard in a d ircction away ironi the shuttle eye and thence downward toward the shuttle eye, the trout edge ot the guide plate extending in a substantially a raight direction diagonally from a point over the eye forward to the lower front end of the trout hook, said guide plate extending sharply downward at its hack part forming a back hook which at the bottom is bent over to ards the side where the shuttle eye is located.

2. The combination in a shuttle having an eye, a bobbin chamber, and a threading chamber in continuation thereol which con nects with the eye; of a shuttle block positioned in the threading chamber and having a thread directing guide plate at the top which extends from a position level with the top of the shuttle, downward and across a plane extending vertically through the axis of a hobhin, when in position in the shuttle, said block haying; a front hook in extension 01 its top which curves drmunrard in a directron away from the shuttle eye, and thence downward towards the shuttle eye, said fronthook tapering from its base to its end, the trout edge of the shuttle block extending in a snbstant ially straight direction, diagonally from a point over the eye thence forward to the lower front end of the trout hook. the said shuttle hlock also having a back hook which extends sharply downward and thence over towards the side where the shuttle eye ltlfl is-loca-ted, said back hook tapering from its base to its end, and its back edge and the front edge of the front hook coming closer together from the top of the guide'plate to the ends thereof.

3. The combination in a shuttle having an' eye, a bobbin chamber, and a threading chamber in continuation thereof which connects with the eye of a, shuttle block positioned in the threading chamber and having a thread directing guide plate at the top which extends from a position level with the top of the shuttle, downward and across a plane extending vertically through the axis of a bobbin, when in position in the shuttle, said block having a front hook in extension of its top which curves downward in a direction away from the shuttle eye, and thence downward towards the shuttle eye, the front edge of the shuttle block extending in a substantially straight direction diagonally from a point over the eye thence forward to the lower front end of the front hook, the said shuttle block also having a back hook which extends sharply downward and thence over towards the side where the shuttle eye is located.

4. The combination in a shuttle having an eye, a bobbin chamber, and a threading chamber in continuation thereof which connects with the eye; of a shuttle block positioned in the threading chamber and having a thread directing guide plate at the top which extends from a position levelwith the top of the shuttle, downward and across a plane extending vertically through the axis of a bobbin, when in position in the shuttle, said block having a front hook in forward extension of its top which curves downward in a direction away from the shuttle eye,

and thence downward towards the shuttle eye, the said shuttle block also having a back hook which extends sharply downward and thence over across the plane towards the side where the shuttle eye is located.

5. The combination in a shuttle having an eye, a bobbin chamber, and a threading chamber in continuation thereof which connects with the eye a delivery passage in forward extension thereof; of a shuttle block positioned in the threading chamber and having a thread directing guide plate at the top which extends from a position level with the top of the shuttle, downward and across aplane extending vertically through the axis of a bobbin, when in position in the shuttle, said block having a front hook in said delivery passage in forward extension of its top which curves downward and forward in a direction away from the shuttle eye, and

thence downward and forward towards the side where the shuttle eye is located, the said shuttle block also having a back hook.

6. The combination in a shuttle havin an eye, a bobbin chamber, and a threading chamber in continuation thereof which con nects with the eye a delivery passage in forward extension thereof; of a shuttle block positioned in the threading chamber and having a thread directing guide plate at the top which extends from a position level with the top of the shuttle, downward and across a plane extending vertically through the axis of a bobbin, when in position in the shuttle, said block having a front hook in said delivery passage in forward extension of its top which curves downward in a direction away from the shuttle eye, and thence downward towards the shuttle eye.

ISAAC SNOW. 

